之前在博客园搜索发现没有用php实现的链表,在百度也几乎没有!所以在这把代码贴上来!
这段代码我认为有些缺陷,是什么呢?就是类型的约束不够严格!php本身是弱类型的语言!
所以在这一块有些迷茫了!忘指点!本人系新手!
下面是代码
节点类
<p class="sycode"> class Node{ private $Data; // 节点数据 private $Next; // 下一节点 public function setData($value){ $ this -> Data = $value; } public function setNext($value){ $ this -> Next = $value; } public function getData(){ return $ this -> Data; } public function getNext(){ return $ this -> Next; } public function __construct($data,$next){ $ this -> setData($data); $ this -> setNext($next); } } </p>
功能类
<p class="sycode"> class LinkList{ private $header; // 头节点 private $size; // 长度 public function getSize(){ $i = 0 ; $node = $ this -> header; while ($node -> getNext() != null ) { $i ++ ; $node = $node -> getNext(); } return $i; } public function setHeader($value){ $ this -> header = $value; } public function getHeader(){ return $ this -> header; } public function __construct(){ header( " content-type:text/html; charset=utf-8 " ); $ this -> setHeader( new Node( null , null )); } /* * *@author MzXy *@param $data--要添加节点的数据 * */ public function add($data) { $node = $ this -> header; while ($node -> getNext() != null ) { $node = $node -> getNext(); } $node -> setNext( new Node($data, null )); } /* * *@author MzXy *@param $data--要移除节点的数据 * */ public function removeAt($data) { $node = $ this -> header; while ($node -> getData() != $data) { $node = $node -> getNext(); } $node -> setNext($node -> getNext()); $node -> setData($node -> getNext() -> getData()); } /* * *@author MzXy *@param 遍历 * */ public function get () { $node = $ this -> header; if ($node -> getNext() == null ){ print( " 数据集为空! " ); return ; } while ($node -> getNext() != null ) { print($node -> getNext() -> getData()); if ($node -> getNext() -> getNext() == null ){ break ;} $node = $node -> getNext(); } } /* * *@author MzXy *@param $data--要访问的节点的数据 * @param 此方法只是演示不具有实际意义 * */ public function getAt($data) { $node = $ this -> header -> getNext(); if ($node -> getNext() == null ){ print( " 数据集为空! " ); return ; } while ($node -> getData() != $data) { if ($node -> getNext() == null ){ break ;} $node = $node -> getNext(); } return $node -> getData(); } /* * *@author MzXy *@param $value--需要更新的节点的原数据 --$initial---更新后的数据 * */ public function update($initial,$value) { $node = $ this -> header -> getNext(); if ($node -> getNext() == null ){ print( " 数据集为空! " ); return ; } while ($node -> getData() != $data) { if ($node -> getNext() == null ){ break ;} $node = $node -> getNext(); } $node -> setData($initial); } } </p>

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